If an objector says, “The proposed operative attribute is absent from the original case,” the dispute resembles denial of the attribute. If the objector denies that the alleged original ruling was established, that is a different objection to the ruling itself.
An effective difference between the original and new cases may defeat the extension; this is considered under farq. If the proposed cause is found in another case but the supposed consequence fails, an issue of naqḍ can arise.
Response method: Answer the precise objection. Repeating the original ruling cannot by itself establish that the asserted operative attribute actually exists.